Where—
(a)the name of a person entitled to be registered by virtue of a recognised overseas diploma is entered in the register, or
(b)an additional diploma granted in a country overseas is entered against a person's name in the register,
the registrar shall enter that diploma in such abbreviated form as the registrar, after consultation with the President of the Council, may select as being convenient but not capable of being mistaken for the abbreviated form of any other diploma.